Warp-operated shuttle attachment



July 7, 1925. 1545358 B. W. SECHRIST WAR? OPERATED SHUTTL E ATTACHMENT Filed May 1923 I 2! 7/ I w 13 Z 6 ;317.70 u m` H i 1) -Patented July 7, 1925.

WARP-OI'ERATED SHUTTLE ATTACHMENTV i Application filed M y 9,

pose by the warp threads in case the latter form a defective shed for the passage of the shuttle. The invention is fully set forth in connection with the accompanying drawings and clearly dened in the subjoined claim.

Fig. l is an enlarged partial plan-view o-f an ordinary loom shuttle, showing an edge View of my applied attachment with the thread-cutting blade projected to part the defiected bobbin thread.

Fig. 2 shows an inner-face View of the attachment with the blade in normal retracted position; the shuttle being indicated in blade 10 thereof, when pro jected in a horizontal plane as hereinafter described, will deflect the feeding bobbin thread against the opposing wall plate 11 of the recess, as indicated by the full line b in Fig. 1 and so effect the breaking or cutting of said thread and the consequent stoppage of the loom.

My improved attachment provides for automatically efl'ecting this projection of the breaker-blade 10 to break the bobbin thread I), by action thereon of any warp-threads which, through entanglement or other cause, may obstruct the free passing of the shuttle in the shed; the purpose being to promptly stop the loom for correction of the trouble before defective fabric is produced.

To this end my improved attachment provides a blade-actuating mechanism which comprises a trigger-lever having a warpthread-contacting arm 12 forming an arouaz Srial No. 637331.

ate projection above the casingl of the attachment and the top surface of the shuttle; s'o as to insure Operating contact thereof with any `warp-threads `which may obstruct the free passage of the shnttle. As shown this arcuate trigger-lever is pivotally mounted at 12 between the front and rear casing plates 13?, 13, and is formed with a dependin trpping extension 12 which is presse against by an adjustab le spring 14: so as to normally hold the arcuate arm 12 at a determined projection through the top of the casing, with the extremity stopped against a casing shoulder 13' This tripping extension 12 of the trigger lever bears against one arm of a bell-crank latch lever which is pivoted to the casing at 21 so that its angled arm 22 will beswung in a vertical plane by action of the trigger lever, with the adjustable spring 14: also acting thereon. The

breaker blade 10, which is pvoted upon a' vertical casing-post 10* as indicated, is provided with a catch 23 adapted to` be retainingly engaged normally by the latch arm 22, but is constantly pressed upon by any suitable blade-projecting spring 24 operative to Swing it horizontally when the latch 22 is released by deflection of the warp-operated trigger lever 12; such swinging movement of the blade 10' pressing the bentbobbin thread b against the opposite wall surface 11 of the recess so as to effect the cutting or breakage of said thread and consequent stoppage' of the loom.

Because of the limited' pressure whichis exertable by the tangled warp threads upon the trigger lever 12, and the jars to which the movable parts are subjected by the frequent sudden stoppages of the shuttle, the several features of construction as set forth cooperate to insure such reliable operation as is essential for practical use; the normally positioned arcnate trigger lever 12 being directly and effectively operated by any contacting warp-threads so as to` posi- UNITED: STATES P'IATENT bFFICE,

tively disengage the latch arm 22 from the i blade catch device 23, while accidental disengagement there'of is prevented by the arrangement of its Swing at right angles to that -of the blade and by the engagng pressure of the adjustable spring 14; and thereleased breaker blade being eflectively swun by its spring 24: so as to press the deflecte bobbin-thread against the opposite wall of the shuttle recess. The preferred specific ru ture may obviously be modified within t claim.

the scope of the nvention s clefined n the hat I claim ist f i In combnaton with& loom shuttle wa-p-operated bobbn' thread-breaker devce conprsng a casng fixedto the 'ecess Wall and arrangedforwardly of the-eop-spndle,

a threaCl-breaker Vblade pvotally connected to said casng'and norma lly arranged at one side of the axs of-the spnclle', an anvil plate located in the recess opposte said casng and at the' opposte side of sad axs, e spring ing a. bobbin spndle and r ecess therefor a urgng Said blade toward said anvil plate, a bell-c ak lever pvoted to Swing in 'a plane at rghtangles to the plane of movement of ;the blacle,; 2p, spring normally forcing said level* ntocontact Wththe blade to permt the level' to' hold' said blade nthe casng,

BYRO N SECHRIST. 

